Amit Trivedi's music came as a whiff of fresh air for music buffs. After out-of-the-box tracks in "Dev D" and "Udaan", the young composer says his song "Dilli" is sure to open the film "No One Killed Jessica" with a bang.

The rock number in Rajkumar Gupta's movie, which stars Rani Mukerji and Vidya Balan, is power-packed and very in-your-face.

"Rajkumar wanted to open the film with a bang; so he suggested a rock track on the capital city Delhi. We did that and then all the other songs followed, " Trivedi told.

The song is extremely hard-hitting. It starts slow but soon gains momentum, packing in a lot of spunk and energy. With strong rock influences and a lead that pierces through, "Dilli" is sure to be a winner.

"No One Killed Jessica" is based on model Jessica Lall who was shot dead in 1999 by Manu Sharma, son of a Haryana politician, in a Delhi night club. Produced by UTV Spotboy, the film features Vidya as Jessica's sister Sabrina, who fought tooth and nail to get justice for the former model. Rani plays a journalist in the movie, which will hit the screens Jan 7 next year.

"All the other tracks in the album have different flavours and different colours that follow the characters' state of mind and narrative of the film.

Apart from "Dilli", another track that is making people sit up and take notice is "Ali re". But Trivedi says it wasn't easy composing the song.

"'Ali re' was a song that was quite tough. I was stuck on it for a very long time. It was based on Rani Mukerji's character in the film, which is very vibrant and has a lot arrogance and attitude. So I had to create a track keeping her character in mind. Along with that it also had to gel in the film. That was a task. I took more than two months to get it right, " the music director said.

The 31-year-old, who got his Bollywood break with music of "Aamir", captured people's attention with the sounds of "Dev D", a film directed by Anurag Kashyap. His song "Emotional Atyachaar" became a cult track.

Trivedi later churned out hit tracks for films like "Udaan" and "Aisha", including the hit number "Gal mitthi mitthi bol".

Trivedi's music has always captured the pulse of youth, but he says he never composes keeping any generation in mind.

"I never thought that I should target youth with my songs. It happened that way that youth got more attracted towards my music, " he said.

But what changed the composer's life was getting the National Award for best music direction for "Dev D".

"It was a big surprise when I got such a prestigious award. It helped me in a lot of ways. It encouraged me a lot, boosted my inner confidence and now I feel that my responsibilities have gone higher; I have to keep doing better work now. So it keeps me on my toes, " Trivedi told.

Asked if he would like to credit his success to anyone, he promptly replied "Anurag Kashyap".

"Definitely Anurag is someone I would like to credit my success with. He is my mentor. He gave me 'Aamir', 'Udaan' and 'Dev D' so that I can carve my own niche. It's all because of him that I've been able to churn out this kind of music, " he said.

After "No One Killed Jessica", the composer has his kitty full with projects like "Chillar Party", "Pehla Sitara", "Kushal Prasad Ka Bhoot" and "Shortcome Shaadi".